Embedded touch display screen, driving method thereof and display device

Abstract

The invention discloses an embedded touch display screen, a driving method thereof and a display device. At least two sub-pixels serve as a sub-pixel group, cathode layers of different sub-pixel groups are independent of one another, in other words, a cathode layer arranged on a whole surface is segmented in the prior art, the cathode layers of the sub-pixel groups are connected with a driver chip through wires, the cathode layers are reused as self-capacitance touch control electrodes, the driver chip detects capacitance value changes of the cathode layers through the wires so as to judge touch control positions, and therefore the touch control function is achieved. In the touch display screen, identical touch control scanning signals are superposed on signals output to signal ends of a sub-pixel circuit and the cathode layers by the driver chip in the fourth stage on the basis of signals output in the third stage, working states of modules of the sub-pixel circuit can be the same as the working state in the third stage, normal display can be guaranteed, and the embedded touch display screen based on an organic electroluminescent display screen is obtained.

Description

technical field

[0001] The invention relates to the technical field of touch display, in particular to an embedded touch display screen, a driving method thereof and a display device. Background technique

[0002] With the rapid development of display technology, touch screen panels (Touch Screen Panels) have gradually spread in people's lives. Currently, touch panels can be classified into: Add on Mode Touch Panel, On Cell Touch Panel, and In Cell Touch Panel according to their composition and structure. Among them, the plug-in touch screen is produced separately from the touch screen and the display screen, and then bonded together to form a display screen with touch function. The plug-in touch screen has disadvantages such as high production cost, low light transmittance, and thick modules. The embedded touch screen embeds the touch electrodes of the touch screen inside the display screen, which can reduce the overall thickness of the module and greatly reduce the produc...

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